I have a 4.4 (patch 10) system where call in vi a sip trunk properly the
caller can press "0" or wait for the timeout to occur to be transferred to
the original destination. Does anyone else have a current 4.4 system with a
non siptrunk or sbc PSTN connection they can test this behavior with?

Also, when looking at the sofia.log I would assume I should see an
indication of a DTMF key press in sofia even when retrieving or when the
parked caller presses the return key.

I suspect there could be an issue with the proxy not recognizing the callid
or fork, but find the call park is a bugger to review.

in a working siptrunk I see:

"2011-08-18T22:02:02.826193Z":2806:MP:INFO:pbx.voice.lab2.tld:MpMedia:B6D45B90:sipxpark:"MpdPtAVT(0x81a3328)
Start Rcv Tone key=10 dB=7 TS=0x000111c0"

in a gateway where it does not work I see:

"2011-08-18T21:55:25.299782Z":1136:MP:INFO:pbx.voice.lab.tld:MpMedia:4175D940:sipxpark:"MpdPtAVT(0x4315fb0)
Start Rcv Tone key=0 dB=9 TS=0x015d0bc8"

I suspect all I am seeing here is a change in the voice profile on my
unamanged gateway to make the Start Rcv Tone key=0 dB=9 look like  Start Rcv
Tone key=10 dB=7

the working trunk says  Start Rcv Tone key=10 dB=7, which is a keypress of
"0".

Does anyone have a DTMF escape sequence primer they can point me to?



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